chore: remove testing update migration + rename auth migration

app/Database/Migrations/2023-04-09-110000_testing_update.php

-<?php
-
-declare(strict_types=1);
-
-/**
- * Class AddCreatedByToPosts Adds created_by field to posts table in database
- *
- * @copyright  2020 Ad Aures
- * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
- * @link       https://castopod.org/
- */
-
-namespace App\Database\Migrations;
-
-use CodeIgniter\Database\Migration;
-
-class AddTestingUpdate extends Migration
-{
-    public function up(): void
-    {
-        $this->forge->addColumn('podcasts', [
-            'cool_update' => [
-                'type' => 'INT',
-                'unsigned' => true,
-                'null' => true,
-                'after' => 'custom_rss',
-            ],
-        ]);
-    }
-
-    public function down(): void
-    {
-        $this->forge->dropColumn('podcasts', 'cool_update');
-    }
-}

modules/Auth/Database/Migrations/2020-12-29-100000_add_is_owner_to_users.php

@@ -6,8 +6,7 @@ namespace App\Database\Migrations;
 
 use CodeIgniter\Database\Migration;
 
-// Add custom column for shield
-class AddCustomColumnForUser extends Migration
+class AddIsOwnerToUsers extends Migration
 {
     public function up(): void
     {